SAMPLING METHOD

• Main Author: OTA TOSHINORI
• Format: Patent
• Language: English
• Published: 05.12.1991
• Subjects: BASIC ELECTRONIC CIRCUITRY; CODE CONVERSION IN GENERAL; CODING; DECODING; ELECTRICITY; MEASURING; MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES; PHYSICS; TESTING

PURPOSE:To shorten the renewing time of a waveform by finely dividing a rough part showing the outline of a waveform in succession to preferentially collect the same. CONSTITUTION:When the lowest and highest levels of the analogue signal outputted from a D/A converter 14 are adjusted so as to respectively coincide with the lowest and highest level (V) of a signal C, in such a case that output levels are respectively V/4, V/2 and 3V/4, the points X, Y, Z where the signal C coincides with the levels become the points of time when the data of N/4, N/2 and 3N/4 are respectively sampled. When outputs MSB, LSB are allowed to correspond to the inputs LSB, MSB of the converter 14 and all of other signals are connected in reverse correspondence when the output of a counter 13 is supplied at every gate signal in order to generate a signal in the converter 14, sample timing is obtained in the order of N/2, N/4, 3N/4 and N/8. When an S/H+A/D circuit 9 is operated at this edge, data are outputted in a desired order. By this method, the outline of a waveform can be indicated at an early stage and the renewing time of the waveform to a new waveform is shortened.